They are divided into two parts separated by a single space. Those two parts are the outward code and the inward code. The Haringey, Greater London outward code includes the postcode area and the postcode Muswell Hill district. The inward code includes the postcode sector and the postcode unit.

If you want to send a mail to Muswell Hill, you should use the corresponding Postcode. Muswell Hill Postcode district is N10 1.